Fix typo in fatal error message

SebastianOsinski · kzaher · commit bb2bab2f88d6 · 2017-11-23T11:22:55.000+01:00
diff --git a/RxSwift/Schedulers/MainScheduler.swift b/RxSwift/Schedulers/MainScheduler.swift
@@ -40,7 +40,7 @@ public final class MainScheduler : SerialDispatchQueueScheduler {
     /// In case this method is called on a background thread it will throw an exception.
     public class func ensureExecutingOnScheduler(errorMessage: String? = nil) {
         if !DispatchQueue.isMain {
-            rxFatalError(errorMessage ?? "Executing on backgound thread. Please use `MainScheduler.instance.schedule` to schedule work on main thread.")
+            rxFatalError(errorMessage ?? "Executing on background thread. Please use `MainScheduler.instance.schedule` to schedule work on main thread.")
         }
     }
 

Original file line number	Diff line number	Diff line change
`@@ -40,7 +40,7 @@ public final class MainScheduler : SerialDispatchQueueScheduler {`
`40`	`40`	`/// In case this method is called on a background thread it will throw an exception.`
`41`	`41`	`public class func ensureExecutingOnScheduler(errorMessage: String? = nil) {`
`42`	`42`	`if !DispatchQueue.isMain {`
`43`		- rxFatalError(errorMessage ?? "Executing on backgound thread. Please use `MainScheduler.instance.schedule` to schedule work on main thread.")
	`43`	+ rxFatalError(errorMessage ?? "Executing on background thread. Please use `MainScheduler.instance.schedule` to schedule work on main thread.")
`44`	`44`	`}`
`45`	`45`	`}`
`46`	`46`